/* ==========================================================================
   瓜圈 alllesson.com — 全站样式表
   分组：base / layout / components / pages / responsive
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. base — 变量、重置、排版基础
   -------------------------------------------------------------------------- */
:root {
  --ink: #16202a;
  --ink-soft: #5a6672;
  --line: #e3e7eb;
  --bg: #ffffff;
  --bg-soft: #f6f8f9;
  --accent: #c2410c;
  --accent-soft: #fdf1ea;
  --radius: 6px;
  --shell: 1080px;
  --gutter: 24px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 15px;
  line-height: 1.7;
  font-weight: 400;
}

h1,
h2,
h3,
h4 {
  margin: 0;
  font-weight: 600;
  line-height: 1.4;
  color: var(--ink);
}

p {
  margin: 0;
}

ul,
ol,
dl,
dd {
  margin: 0;
  padding: 0;
}

li {
  list-style: none;
}

a {
  color: var(--ink);
  text-decoration: none;
}

a:hover,
a:focus-visible {
  color: var(--accent);
}

img {
  display: block;
  max-width: 100%;
  height: auto;
}

figure {
  margin: 0;
}

button {
  font: inherit;
  color: inherit;
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* --------------------------------------------------------------------------
   2. layout — 页头、导航、主容器、页脚骨架
   -------------------------------------------------------------------------- */
.site-body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  background: var(--bg);
  color: var(--ink);
  font-size: 15px;
  line-height: 1.7;
}

/* --- 页头 --- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: var(--bg);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 28px;
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 var(--gutter);
  min-height: 64px;
}

.brand {
  flex: 0 0 auto;
  font-size: 19px;
  font-weight: 600;
  color: var(--ink);
  letter-spacing: 0;
}

.brand:hover,
.brand:focus-visible {
  color: var(--accent);
}

/* --- 主导航 --- */
.site-nav {
  flex: 1 1 auto;
  min-width: 0;
}

.nav-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 4px 22px;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  font-size: 15px;
  color: var(--ink-soft);
  border-bottom: 2px solid transparent;
}

.nav-link:hover,
.nav-link:focus-visible {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.nav-link.is-current {
  color: var(--accent);
  font-weight: 600;
  border-bottom-color: var(--accent);
}

.lang-mark {
  flex: 0 0 auto;
  font-size: 13px;
  color: var(--ink-soft);
  white-space: nowrap;
}

/* --- 汉堡按钮 --- */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 0 10px;
  background: none;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  cursor: pointer;
}

.nav-toggle-bar {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--ink);
}

/* --- 主容器 --- */
.site-main {
  flex: 1 1 auto;
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.inner-main {
  padding-top: 20px;
  padding-bottom: 64px;
}

.home-main {
  padding-bottom: 72px;
}

/* --- 内页两栏布局 --- */
.page-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 280px;
  column-gap: 80px;
  align-items: start;
}

.column-main {
  min-width: 0;
  max-width: 720px;
}

.column-aside {
  min-width: 0;
  position: sticky;
  top: 88px;
  align-self: start;
}

/* 侧栏在前的变体 */
.sidebar-left .page-layout {
  grid-template-columns: 280px minmax(0, 1fr);
}

.sidebar-left .column-main {
  order: 2;
}

.sidebar-left .column-aside {
  order: 1;
}

/* --- 页脚 --- */
.site-footer {
  border-top: 1px solid var(--line);
  background: var(--bg-soft);
  color: var(--ink-soft);
  font-size: 13px;
}

.footer-inner {
  display: grid;
  grid-template-columns: minmax(220px, 1.4fr) repeat(4, minmax(120px, 1fr));
  gap: 32px 28px;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 44px var(--gutter) 32px;
}

.footer-brand-name {
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
}

.footer-brand-desc {
  margin-top: 8px;
  line-height: 1.7;
}

.footer-group-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 10px;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.footer-links a {
  display: inline-block;
  min-height: 24px;
  color: var(--ink-soft);
}

.footer-links a:hover,
.footer-links a:focus-visible {
  color: var(--accent);
}

.footer-note {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 18px var(--gutter) 40px;
  border-top: 1px solid var(--line);
  line-height: 1.7;
}

/* --------------------------------------------------------------------------
   3. components — 通用区块、按钮、条目、问答、侧栏
   -------------------------------------------------------------------------- */

/* --- 区块标题组 --- */
.section-head {
  margin-bottom: 22px;
}

.section-head h2,
section > h2 {
  font-size: 20px;
}

.section-desc,
.section-note,
.section-intro,
.group-desc {
  margin-top: 8px;
  color: var(--ink-soft);
  font-size: 14px;
  line-height: 1.7;
}

.section-more {
  margin-top: 18px;
  font-size: 14px;
}

.text-link {
  color: var(--accent);
  border-bottom: 1px solid transparent;
}

.text-link:hover,
.text-link:focus-visible {
  border-bottom-color: var(--accent);
}

/* --- 按钮 --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 20px;
  border-radius: var(--radius);
  font-size: 15px;
  border: 1px solid transparent;
  cursor: pointer;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

.btn-primary:hover,
.btn-primary:focus-visible {
  background: #a5350a;
  border-color: #a5350a;
  color: #fff;
}

.btn-ghost {
  background: var(--bg);
  color: var(--ink);
  border-color: var(--line);
}

.btn-ghost:hover,
.btn-ghost:focus-visible {
  color: var(--accent);
  border-color: var(--accent);
}

/* --- 图片容器 --- */
figure img {
  width: 100%;
  height: auto;
  border-radius: var(--radius);
  object-fit: cover;
  background: var(--bg-soft);
}

figcaption {
  margin-top: 8px;
  font-size: 13px;
  color: var(--ink-soft);
  line-height: 1.6;
}

.content-media,
.hero-figure,
.page-figure,
.media-figure,
.content-figure,
.term-figure {
  width: 100%;
}

/* --- 面包屑 --- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--ink-soft);
  margin-bottom: 16px;
}

.breadcrumb a {
  color: var(--ink-soft);
}

.breadcrumb a:hover,
.breadcrumb a:focus-visible {
  color: var(--accent);
}

.breadcrumb-sep {
  color: var(--line);
}

.breadcrumb-current {
  color: var(--ink);
}

.breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: center;
}

.breadcrumb-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.breadcrumb-item + .breadcrumb-item::before {
  content: "/";
  color: var(--line);
}

/* --- 页面标题区 --- */
.page-header {
  margin-bottom: 20px;
}

.page-title {
  font-size: 32px;
  font-weight: 600;
  color: var(--ink);
  line-height: 1.35;
}

.page-lead,
.page-title-lead {
  margin-top: 10px;
  font-size: 15px;
  color: var(--ink-soft);
  max-width: 42em;
}

.page-field-note,
.page-title-note,
.page-fields {
  margin-top: 8px;
  font-size: 13px;
  color: var(--ink-soft);
  max-width: 42em;
}

.page-title-inner {
  max-width: 720px;
}

.page-title-fields {
  margin-top: 12px;
  display: grid;
  grid-template-columns: 96px minmax(0, 1fr);
  gap: 4px 12px;
  font-size: 13px;
}

.page-title-fields dt {
  color: var(--ink-soft);
}

.page-title-fields dd {
  color: var(--ink);
}

/* --- 能力条目行 --- */
.entry-list {
  display: flex;
  flex-direction: column;
}

.entry-row {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr) minmax(0, 1fr) auto;
  align-items: baseline;
  gap: 4px 16px;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
}

.entry-num,
.entry-no {
  font-size: 13px;
  color: var(--ink-soft);
  font-variant-numeric: tabular-nums;
}

.entry-name {
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
}

.entry-target,
.entry-audience {
  font-size: 14px;
  color: var(--ink-soft);
}

.entry-status {
  justify-self: end;
  align-self: center;
  padding: 2px 8px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-size: 12px;
  color: var(--ink-soft);
  white-space: nowrap;
}

.status-fit {
  color: var(--accent);
  border-color: var(--accent);
}

.status-ask {
  color: var(--ink-soft);
  border-color: var(--line);
}

/* --- 术语行（首页速查 & 内页表） --- */
.term-quick-list,
.term-rows {
  display: flex;
  flex-direction: column;
}

.term-row {
  display: grid;
  grid-template-columns: minmax(140px, 220px) minmax(0, 1fr);
  gap: 6px 20px;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
}

.term-name {
  font-size: 15px;
  font-weight: 600;
  color: var(--ink);
}

.term-define,
.term-def {
  font-size: 14px;
  color: var(--ink-soft);
}

/* --- 场景容器 --- */
.scenario-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
}

.scenario-card {
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg);
}

.scenario-name {
  font-size: 16px;
}

.scenario-sign,
.scenario-basis,
.scenario-fix {
  margin-top: 8px;
  font-size: 14px;
  color: var(--ink-soft);
}

.scenario-list {
  display: flex;
  flex-direction: column;
}

.scenario-row {
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

/* --- 步骤条 --- */
.step-list {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px;
  counter-reset: step;
}

.step-item {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-soft);
}

.step-index {
  display: block;
  font-size: 13px;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
}

.step-name {
  margin-top: 6px;
  font-size: 16px;
}

.step-output,
.step-party {
  margin-top: 8px;
  font-size: 13px;
  color: var(--ink-soft);
}

/* --- 定义列表（交付清单 / 字段说明 / 步骤明细） --- */
.deliverable-list,
.field-list,
.detail-list {
  display: flex;
  flex-direction: column;
}

.deliverable-row {
  display: grid;
  grid-template-columns: minmax(140px, 220px) minmax(0, 1fr);
  gap: 6px 20px;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
}

.deliverable-name {
  font-size: 15px;
  font-weight: 600;
  color: var(--ink);
}

.deliverable-rule {
  font-size: 14px;
  color: var(--ink-soft);
}

.field-list dt,
.detail-list dt {
  padding-top: 12px;
  font-size: 15px;
  font-weight: 600;
  color: var(--ink);
}

.field-list dd,
.detail-list dd {
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
  font-size: 14px;
  color: var(--ink-soft);
}

.detail-output,
.detail-party {
  font-size: 14px;
  color: var(--ink-soft);
}

.detail-party {
  margin-top: 4px;
}

/* --- 问答 --- */
.faq-list,
.faq-group {
  display: flex;
  flex-direction: column;
}

.faq-item {
  border-bottom: 1px solid var(--line);
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  min-height: 48px;
  padding: 12px 0;
  font-size: 15px;
  font-weight: 600;
  color: var(--ink);
  cursor: pointer;
  list-style: none;
}

.faq-question::-webkit-details-marker {
  display: none;
}

.faq-question::after {
  content: "+";
  flex: 0 0 auto;
  font-size: 18px;
  font-weight: 400;
  color: var(--accent);
}

.faq-item[open] .faq-question::after {
  content: "–";
}

.faq-question:hover,
.faq-question:focus-visible {
  color: var(--accent);
}

.faq-answer {
  padding: 0 0 14px;
  font-size: 14px;
  color: var(--ink-soft);
}

.faq-answer p + p {
  margin-top: 8px;
}

/* --- 准备清单 --- */
.prepare-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  counter-reset: prepare;
}

.prepare-item {
  position: relative;
  padding-left: 30px;
  font-size: 14px;
  color: var(--ink-soft);
  min-height: 24px;
}

.prepare-item::before {
  counter-increment: prepare;
  content: counter(prepare);
  position: absolute;
  left: 0;
  top: 1px;
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line);
  border-radius: 50%;
  font-size: 12px;
  color: var(--accent);
}

.prepare-name {
  font-size: 15px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 4px;
}

.prepare-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

/* --- 侧栏 --- */
.aside-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--ink);
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 12px;
}

.aside-list,
.aside-links {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.aside-list a,
.aside-links a {
  display: flex;
  align-items: center;
  min-height: 44px;
  font-size: 14px;
  color: var(--ink-soft);
  border-bottom: 1px solid transparent;
}

.aside-list a:hover,
.aside-list a:focus-visible,
.aside-links a:hover,
.aside-links a:focus-visible {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.aside-note,
.aside-related {
  margin-top: 24px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
}

.aside-note-title,
.aside-related-title {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 10px;
}

/* --------------------------------------------------------------------------
   4. pages — 首页与各内页专属模块
   -------------------------------------------------------------------------- */

/* --- 首页：首屏 --- */
.hero {
  padding: 48px 0 40px;
  border-bottom: 1px solid var(--line);
}

.hero-inner {
  display: grid;
  grid-template-columns: 420px minmax(0, 1fr);
  gap: 40px;
  align-items: start;
}

.hero-catalog h1 {
  font-size: 32px;
  line-height: 1.35;
}

.hero-lead {
  margin-top: 12px;
  font-size: 15px;
  color: var(--ink-soft);
  max-width: 34em;
}

.hero-catalog-nav {
  margin-top: 24px;
}

.catalog-list {
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--line);
}

.catalog-list li {
  border-bottom: 1px solid var(--line);
}

.catalog-link {
  display: flex;
  align-items: center;
  min-height: 48px;
  font-size: 15px;
  color: var(--ink);
}

.catalog-link:hover,
.catalog-link:focus-visible {
  color: var(--accent);
}

.hero-visual {
  min-width: 0;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 20px;
}

.content-media-primary {
  margin-top: 40px;
}

.content-media-primary img {
  aspect-ratio: 16 / 7;
}

/* --- 首页：服务能力密集目录 --- */
.capability-index {
  padding: 48px 0;
  border-bottom: 1px solid var(--line);
}

.capability-group + .capability-group {
  margin-top: 32px;
}

.group-head {
  margin-bottom: 12px;
}

.group-title {
  font-size: 16px;
}

/* --- 首页：术语速查 --- */
.term-quick {
  padding: 48px 0;
  border-bottom: 1px solid var(--line);
}

/* --- 首页：场景排查路径 --- */
.scenario-paths {
  padding: 48px 0;
  border-bottom: 1px solid var(--line);
}

/* --- 首页：合作方式四步 --- */
.engagement-steps {
  padding: 48px 0;
  border-bottom: 1px solid var(--line);
}

/* --- 首页：交付清单 --- */
.deliverables {
  padding: 48px 0;
  border-bottom: 1px solid var(--line);
}

/* --- 首页：常见问题摘要 --- */
.faq-brief {
  padding: 48px 0;
  border-bottom: 1px solid var(--line);
}

/* --- 首页：合作前准备 --- */
.prepare {
  padding: 48px 0 8px;
}

/* --- 内页：服务能力 --- */
.page-capabilities .capability-group {
  padding-top: 28px;
  margin-top: 28px;
  border-top: 1px solid var(--line);
}

.page-capabilities .capability-group:first-of-type {
  padding-top: 0;
  margin-top: 0;
  border-top: 0;
}

.page-capabilities .capability-group h2 {
  font-size: 20px;
}

.page-capabilities .entry-list {
  margin-top: 14px;
}

.field-define,
.boundary,
.related-links {
  padding-top: 28px;
  margin-top: 28px;
  border-top: 1px solid var(--line);
}

.field-define h2,
.boundary h2,
.related-links h2 {
  font-size: 20px;
}

.field-list {
  margin-top: 14px;
}

.boundary-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
  margin-top: 14px;
}

.boundary-col h3 {
  font-size: 15px;
  margin-bottom: 8px;
}

.boundary-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.boundary-list li {
  position: relative;
  padding-left: 16px;
  font-size: 14px;
  color: var(--ink-soft);
}

.boundary-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 1px;
  background: var(--accent);
}

.link-list {
  display: flex;
  flex-direction: column;
  gap: 2px;
  margin-top: 12px;
}

.link-list a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  font-size: 14px;
  color: var(--accent);
}

/* --- 内页：场景排查 --- */
.page-scenarios .scenario-overview {
  padding-bottom: 28px;
  border-bottom: 1px solid var(--line);
}

.page-scenarios .media-figure {
  margin-top: 18px;
}

.page-scenarios .media-figure img {
  aspect-ratio: 16 / 7;
}

.page-scenarios .scenario-list {
  margin-top: 18px;
}

.page-scenarios .scenario-row h3 {
  font-size: 16px;
}

.locate-path,
.advice {
  padding-top: 28px;
  margin-top: 28px;
  border-top: 1px solid var(--line);
}

.locate-path h2,
.advice h2 {
  font-size: 20px;
}

.stage-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-top: 16px;
}

.stage-item {
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-soft);
}

.stage-name {
  font-size: 16px;
}

.stage-desc {
  margin-top: 8px;
  font-size: 14px;
  color: var(--ink-soft);
}

.stage-checks {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-top: 12px;
}

.stage-checks li {
  position: relative;
  padding-left: 16px;
  font-size: 14px;
  color: var(--ink-soft);
}

.stage-checks li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 1px;
  background: var(--accent);
}

.stage-fields {
  margin-top: 12px;
  font-size: 13px;
  color: var(--ink-soft);
}

.advice-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-top: 16px;
}

.advice-item {
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}

.advice-name {
  font-size: 15px;
}

.advice-item p {
  margin-top: 6px;
  font-size: 14px;
  color: var(--ink-soft);
}

/* --- 内页：合作方式 --- */
.page-workflow .page-title {
  margin-bottom: 4px;
}

.workflow-overview {
  padding-top: 28px;
  margin-top: 28px;
  border-top: 1px solid var(--line);
}

.workflow-overview h2,
.workflow-detail h2,
.workflow-prepare h2,
.workflow-change h2,
.workflow-links h2 {
  font-size: 20px;
}

.workflow-overview > p,
.workflow-detail > p,
.workflow-prepare > p,
.workflow-change > p,
.workflow-links > p {
  margin-top: 8px;
  font-size: 14px;
  color: var(--ink-soft);
}

.step-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
  margin-top: 18px;
}

.step-card {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-soft);
}

.step-card .step-name {
  margin-top: 6px;
  font-size: 16px;
}

.step-desc {
  margin-top: 8px;
  font-size: 13px;
  color: var(--ink-soft);
}

.workflow-detail,
.workflow-prepare,
.workflow-change,
.workflow-links {
  padding-top: 28px;
  margin-top: 28px;
  border-top: 1px solid var(--line);
}

.content-figure {
  margin-top: 18px;
}

.content-figure img {
  aspect-ratio: 16 / 7;
}

.detail-list {
  margin-top: 18px;
}

.workflow-prepare .prepare-list {
  margin-top: 16px;
}

.workflow-prepare .prepare-item {
  padding: 14px 0 14px 30px;
  border-bottom: 1px solid var(--line);
}

.change-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-top: 16px;
}

.change-item {
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}

.change-name {
  font-size: 15px;
}

.change-item p {
  margin-top: 6px;
  font-size: 14px;
  color: var(--ink-soft);
}

.workflow-links .related-links {
  display: flex;
  flex-direction: column;
  gap: 2px;
  margin-top: 12px;
  padding-top: 0;
  border-top: 0;
}

.workflow-links .related-links a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  font-size: 14px;
  color: var(--accent);
}

/* --- 内页：术语口径 --- */
.page-terms .terms-table,
.page-terms .term-rules,
.page-terms .term-compare {
  padding-top: 28px;
  margin-top: 28px;
  border-top: 1px solid var(--line);
}

.page-terms .terms-table {
  padding-top: 0;
  margin-top: 0;
  border-top: 0;
}

.page-terms .terms-table h2,
.page-terms .term-rules h2,
.page-terms .term-compare h2 {
  font-size: 20px;
}

.term-rows {
  margin-top: 16px;
}

.rule-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-top: 16px;
}

.rule-item {
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}

.rule-title {
  font-size: 15px;
}

.rule-desc {
  margin-top: 6px;
  font-size: 14px;
  color: var(--ink-soft);
}

.compare-rows {
  display: flex;
  flex-direction: column;
  margin-top: 16px;
}

.compare-row {
  display: grid;
  grid-template-columns: minmax(120px, 1fr) 32px minmax(120px, 1fr);
  align-items: center;
  gap: 8px;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
  font-size: 14px;
}

.compare-from {
  color: var(--ink-soft);
  text-decoration: line-through;
}

.compare-arrow {
  text-align: center;
  color: var(--accent);
}

.compare-to {
  color: var(--ink);
  font-weight: 600;
}

.term-figure {
  margin-top: 28px;
}

.term-figure img {
  aspect-ratio: 16 / 7;
}

.related-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 18px;
  margin-top: 28px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}

.related-links-label {
  font-size: 13px;
  color: var(--ink-soft);
}

.related-links-item {
  font-size: 14px;
  color: var(--accent);
}

/* --- 内页：团队职责 --- */
.page-team .duty-groups,
.page-team .duty-methods,
.page-team .duty-content,
.page-team .duty-collab {
  padding-top: 28px;
  margin-top: 28px;
  border-top: 1px solid var(--line);
}

.page-team .duty-groups {
  padding-top: 0;
  margin-top: 0;
  border-top: 0;
}

.page-team .duty-groups h2,
.page-team .duty-methods h2,
.page-team .duty-content h2,
.page-team .duty-collab h2 {
  font-size: 20px;
}

.duty-item {
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
}

.duty-name {
  font-size: 16px;
}

.duty-fields {
  display: grid;
  grid-template-columns: 96px minmax(0, 1fr);
  gap: 6px 16px;
  margin-top: 12px;
  font-size: 14px;
}

.duty-fields dt {
  color: var(--ink-soft);
}

.duty-fields dd {
  color: var(--ink);
}

.page-team .media-figure {
  margin-top: 18px;
}

.page-team .media-figure img {
  aspect-ratio: 16 / 7;
}

.method-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-top: 18px;
}

.method-item {
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}

.method-name {
  font-size: 15px;
}

.method-item p {
  margin-top: 6px;
  font-size: 14px;
  color: var(--ink-soft);
}

.content-direction-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin-top: 18px;
}

.content-direction-item {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.content-direction-name {
  font-size: 15px;
}

.content-direction-item p {
  margin-top: 6px;
  font-size: 14px;
  color: var(--ink-soft);
}

.collab-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 16px;
}

.collab-item {
  position: relative;
  padding-left: 16px;
  font-size: 14px;
  color: var(--ink-soft);
}

.collab-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 1px;
  background: var(--accent);
}

.page-team .section-more {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
}

.page-team .section-more a {
  font-size: 14px;
  color: var(--accent);
}

/* --- 内页：常见问题 --- */
.page-faq .page-figure {
  margin-top: 28px;
}

.page-faq .page-figure img {
  aspect-ratio: 16 / 7;
}

.page-faq .faq-group {
  padding-top: 28px;
  margin-top: 28px;
  border-top: 1px solid var(--line);
}

.page-faq .faq-group:first-of-type {
  padding-top: 0;
  margin-top: 0;
  border-top: 0;
}

.page-faq .faq-group h2 {
  font-size: 20px;
}

.page-faq .faq-list {
  margin-top: 12px;
}

/* --- 404 --- */
.error-main {
  padding-top: 72px;
  padding-bottom: 88px;
}

.error-block {
  max-width: 640px;
}

.error-title {
  font-size: 32px;
  line-height: 1.35;
}

.error-lead {
  margin-top: 14px;
  font-size: 15px;
  color: var(--ink-soft);
}

.error-reasons {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 20px;
}

.error-reasons li {
  position: relative;
  padding-left: 16px;
  font-size: 14px;
  color: var(--ink-soft);
}

.error-reasons li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 1px;
  background: var(--accent);
}

.error-hint {
  margin-top: 20px;
  font-size: 14px;
  color: var(--ink-soft);
}

.error-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.error-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-size: 15px;
  color: var(--ink);
  background: var(--bg);
}

.error-btn:hover,
.error-btn:focus-visible {
  color: var(--accent);
  border-color: var(--accent);
}

.error-btn-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.error-btn-primary:hover,
.error-btn-primary:focus-visible {
  background: #a5350a;
  border-color: #a5350a;
  color: #fff;
}

/* --------------------------------------------------------------------------
   5. responsive — 960px 与 640px 断点
   -------------------------------------------------------------------------- */
@media (max-width: 960px) {
  .page-layout,
  .sidebar-left .page-layout {
    grid-template-columns: minmax(0, 1fr);
    row-gap: 40px;
  }

  .column-main {
    max-width: none;
  }

  .column-aside {
    position: static;
    top: auto;
  }

  .sidebar-left .column-main,
  .sidebar-left .column-aside {
    order: initial;
  }

  .hero {
    padding: 36px 0 32px;
  }

  .hero-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 28px;
  }

  .scenario-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .step-list,
  .step-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .footer-inner {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 28px 24px;
  }

  .footer-brand {
    grid-column: 1 / -1;
  }
}

@media (max-width: 640px) {
  body,
  .site-body {
    font-size: 14px;
  }

  :root {
    --gutter: 18px;
  }

  .header-inner {
    flex-wrap: wrap;
    gap: 12px;
    min-height: 60px;
  }

  .brand {
    font-size: 17px;
  }

  .site-nav {
    flex: 1 1 100%;
    order: 4;
  }

  .nav-toggle {
    display: flex;
    margin-left: auto;
  }

  .lang-mark {
    order: 3;
  }

  .nav-list {
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    width: 100%;
    padding: 8px 0 12px;
    border-top: 1px solid var(--line);
  }

  .nav-list.is-open {
    display: flex;
  }

  .nav-link {
    min-height: 48px;
    border-bottom: 1px solid var(--line);
  }

  .nav-link.is-current {
    border-bottom-color: var(--accent);
  }

  .page-title,
  .hero-catalog h1,
  .error-title {
    font-size: 22px;
  }

  .section-head h2,
  section > h2,
  .page-capabilities .capability-group h2,
  .page-scenarios .locate-path h2,
  .page-scenarios .advice h2,
  .page-terms .terms-table h2,
  .page-terms .term-rules h2,
  .page-terms .term-compare h2,
  .page-team .duty-groups h2,
  .page-team .duty-methods h2,
  .page-team .duty-content h2,
  .page-team .duty-collab h2,
  .page-faq .faq-group h2,
  .workflow-overview h2,
  .workflow-detail h2,
  .workflow-prepare h2,
  .workflow-change h2,
  .workflow-links h2,
  .field-define h2,
  .boundary h2,
  .related-links h2 {
    font-size: 18px;
  }

  .entry-name,
  .scenario-name,
  .step-name,
  .step-card .step-name,
  .duty-name,
  .method-name,
  .content-direction-name,
  .rule-title,
  .advice-name,
  .change-name {
    font-size: 15px;
  }

  .entry-row {
    grid-template-columns: 32px minmax(0, 1fr);
    gap: 4px 12px;
  }

  .entry-name,
  .entry-target,
  .entry-audience {
    grid-column: 2;
  }

  .entry-status {
    grid-column: 2;
    justify-self: start;
    margin-top: 4px;
  }

  .term-row,
  .deliverable-row {
    grid-template-columns: minmax(0, 1fr);
    gap: 4px;
  }

  .scenario-grid,
  .step-list,
  .step-grid,
  .boundary-columns,
  .content-direction-list {
    grid-template-columns: minmax(0, 1fr);
  }

  .compare-row {
    grid-template-columns: minmax(0, 1fr) 24px minmax(0, 1fr);
    font-size: 13px;
  }

  .duty-fields,
  .page-title-fields {
    grid-template-columns: minmax(0, 1fr);
    gap: 2px;
  }

  .duty-fields dd {
    margin-bottom: 8px;
  }

  .footer-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
    padding: 36px var(--gutter) 24px;
  }

  .footer-links a {
    min-height: 32px;
  }

  .error-main {
    padding-top: 48px;
    padding-bottom: 64px;
  }

  .btn,
  .error-btn {
    width: 100%;
  }

  .hero-actions,
  .prepare-actions,
  .error-actions {
    flex-direction: column;
    align-items: stretch;
  }
}